Improved sash-fastening



UNTTRD STATES PATENT OFFICE.

CHARLES B.I CLARK, OF NEW HAVEN, CONNECTICUT.

IMPROVED SASH-FASTENING.

Specification forming part of Letters Patent No. 52,388, dated February6, 1866.

To all whom it may concern:

Be it known that I, CHARLES B. CLARK, of New Haven, in the county of NewHaven and State of Connecticut, have invented a new and ImprovedVVindow-Sash Fastener; and I do herebydeclare that the following isafull, clear, and exact description thereof, which will enable thoseskilled in the art to make and use the same, reference being had to theaccompanyin g drawings, forming part of this speciiication, in which-Figure l is a side view of my invention applied to a window-sash, thestile of the latter being in section 5 Fig. 2, a detached and enlargedsectional side view of a portion ot' the same.

Similar letters of reference indicate corresponding parts.

rIlhis invention relates to au improvement on a sash-fastening for whichLetters Patent were granted to me bearing date December 8, 1863.

The object of the present invention is to simplify the patented deviceabove referred to and to render the same available as amortise-fastening, so that it will not be so prominent or have such anexposed position on the sash as hitherto.

A represents a plate which has a curved or segment rack, B, attached toit, and C C' are two curved arms, which work on a fixed pin, a, on plateA, said arms, by their curvature, eXtendin g around in front of therack, as shown in Fig. 1. D D are two rollers on the ends of the arms CC', one on each. These rollers have a portion of their peripheriestoothed, and these toothed portions engage with the rack B, as shown inFig. 1. 0n the pin a there is placed a spiral spring', b, the ends ofwhich bear against the ends of the arms C C', and have a tendency topress the rollers D D toward each other, as will be fully understood byreferring to Fig. 2. On the pin a there is also fitted a lever, E, whichis allowed to turn freely on said pin and is provided with a projection,c, which, by actuating the lever E, may be made to press against theinner end of either arm C or C', and move the rollers D thereof outwardin the direction indicated by the arrow.

By this arrangement it will be seen that one lever, E, is made toactuate either arm The operation of the rollers D D against the 1 sideof the window-frame FX is precisely the same as in. the originalinvention, and the rack B performs in this case the same function as itdid in the other.

By the within-described invention the fastening is entirely concealed ina mortise in the stile E of the sash, the lever E being alone exposed.

I do not claim the rack B and arms C C', provided with rollers D D,having portions ot' their peripheries toothed, for that device has beenused and already patented by me; but

I do claim as new and desire to secure by Letters Patent- The rack B andthe arms C C', provided with rollers D D, having their peripheriespartially toothed, when said parts are used in combination with a singlelever, E, arranged substantially as shown, to operate either arm C orC', as set forth.

CHARLES B. CLARK.

Witnesses:

E. HosnoRD, E. G. CLARK.

